Answer:
A. the operating system
Step-by-step explanation:
You want to know which of the listed items cannot be used as search criteria in a file search.
File attributes
Many operating systems store attributes along with a file name. These can include the creation date, the date of the last modification, the creator, the owner, the modifier, read/modify/delete permissions, size, type, the application that opens it, and more.
In general, the operating system is the environment in which the file resides, so it will be the same for all stored files.
File contents
Some file search facilities also include the capability to search for files containing specific content.
In general you can search using the listed criteria except (A) the operating system.